The term 'ADVERSE AFTERMATH' can be broken down into two words: 'ADVERSE' and 'AFTERMATH'. ADVERSE means unfavorable or harmful, while AFTERMATH refers to the consequences of an event. Together, the phrase 'ADVERSE AFTERMATH' describes the negative results that follow a particular event. The crossword solution for this term is 'Fallout', which is defined as the residual effects of a particular event. In other words, it is the long-term consequences of a particular event.